About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
|
Symposium
|
Ceramics for New Generation Nuclear Energy System Application
|
Presentation Title |
Interface Effect on the Distributions of Radiation Induced Defects |
Author(s) |
Farida Selim |
On-Site Speaker (Planned) |
Farida Selim |
Abstract Scope |
Stability of materials in extreme environments of high temperature and radiation and corrosive media directly affect the lifespan of nuclear reactors. In such environment, an oxide layer forms on the surface and acts as a passive layer protecting the material underneath from corrosion. It is crucial to understand how the presence of interface impacts defect formation and evolution. Understanding interface effect on radiation induced defects in nuclear fuel structures and claddings is also of great interest. Depth-resolved positron annihilation spectroscopy (PAS) and transmission electron microscopy (TEM) were used to investigate the effect of interface on the distributions of ion induced defects in various structures and phases. PAS measurements revealed how the presence of interface modifies the distributions of point defects. TEM measurements showed that irradiation induced lattice mismatch and dislocations in the interface have a big impact on redistribution of point defects and their accumulation and clustering. |